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| Mirrors > Home > MPE Home > Th. List > eqsupd | Structured version Visualization version GIF version | ||
| Description: Sufficient condition for an element to be equal to the supremum. (Contributed by Mario Carneiro, 21-Apr-2015.) |
| Ref | Expression |
|---|---|
| supmo.1 | ⊢ (𝜑 → 𝑅 Or 𝐴) |
| eqsupd.2 | ⊢ (𝜑 → 𝐶 ∈ 𝐴) |
| eqsupd.3 | ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐵) → ¬ 𝐶𝑅𝑦) |
| eqsupd.4 | ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐴 ∧ 𝑦𝑅𝐶)) → ∃𝑧 ∈ 𝐵 𝑦𝑅𝑧) |
| Ref | Expression |
|---|---|
| eqsupd | ⊢ (𝜑 → sup(𝐵, 𝐴, 𝑅) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqsupd.2 | . 2 ⊢ (𝜑 → 𝐶 ∈ 𝐴) | |
| 2 | eqsupd.3 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐵) → ¬ 𝐶𝑅𝑦) | |
| 3 | 2 | ralrimiva 3154 | . 2 ⊢ (𝜑 → ∀𝑦 ∈ 𝐵 ¬ 𝐶𝑅𝑦) |
| 4 | eqsupd.4 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐴 ∧ 𝑦𝑅𝐶)) → ∃𝑧 ∈ 𝐵 𝑦𝑅𝑧) | |
| 5 | 4 | expr 462 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → (𝑦𝑅𝐶 → ∃𝑧 ∈ 𝐵 𝑦𝑅𝑧)) |
| 6 | 5 | ralrimiva 3154 | . 2 ⊢ (𝜑 → ∀𝑦 ∈ 𝐴 (𝑦𝑅𝐶 → ∃𝑧 ∈ 𝐵 𝑦𝑅𝑧)) |
| 7 | supmo.1 | . . 3 ⊢ (𝜑 → 𝑅 Or 𝐴) | |
| 8 | 7 | eqsup 9429 | . 2 ⊢ (𝜑 → ((𝐶 ∈ 𝐴 ∧ ∀𝑦 ∈ 𝐵 ¬ 𝐶𝑅𝑦 ∧ ∀𝑦 ∈ 𝐴 (𝑦𝑅𝐶 → ∃𝑧 ∈ 𝐵 𝑦𝑅𝑧)) → sup(𝐵, 𝐴, 𝑅) = 𝐶)) |
| 9 | 1, 3, 6, 8 | mp3and 1493 | 1 ⊢ (𝜑 → sup(𝐵, 𝐴, 𝑅) = 𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∃wrex 3086 class class class wbr 5103 Or wor 5562 supcsup 9413 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-po 5563 df-so 5564 df-iota 6489 df-riota 7371 df-sup 9415 |
| This theorem is used by: supmax 9441 supiso 9449 dfgcd2 16639 esumpcvgval 34591 esum2d 34606 mblfinlem3 38411 mblfinlem4 38412 ismblfin 38413 itg2addnclem 38423 radcnvrat 45141 |
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